Sash-lock.



No. 703,976; Patented July I, I902.

A. M. SOUTHARD.

SASH LOCK.

(Application filed Sept. 16, 1901.)

(No Model.)

INVENTOR. A. M Jay/bard.

UNITED STATES ATENT FFICE.

ABRAHAM M. SOUTHARD, OF DENVER, COLORADO, ASSIGNOR OF ONE- FOURTH TO AUGUSTUS WV. OOLBURN, OF DENVER, COLORADO.

SASH-LOCK.

I SPECIFICATION forming part 01''. Letters Patent No 7 03,976, dated July 1, 1902.

Application filed September 16, 1901. Serial No; 75,470. (No model.)

To all whom it may concern Be it known that .I, ABRAHAM M. SOUTH- ARD, a citizen of the United States of America, residing at Denver, inithecounty of Arapahoe and Stateof Colorado, have invented certain new and useful Improvements in Sash- Locks; and Ido declare the following to be a full, clear, and exact description of the invention, such as willenable others skilled in the art to which itapp ertain's to make and use the same, referencebeinghad to the accompanying drawings, and-tothe characters of reference marked thereon, which form a part of this specification." I

My invention relatesto improvements in sash-locks, my object being to provide a device of this class adapted'normally to prevent the sash from moving up or, down when the latter is properly adjusted, but which may be easily actuated to permit the adjustment of the sash when necessary; and to these ends the invention consists of the features, arrangements, and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof. i

In the drawings, Figure 1 is a section taken longitudinally through the sash-rail, show ing my improved lock in place. Fig. 2 is a face view of the sash, showing the lock in place. Fig. 3 is a cross-section taken on the line 50 0c, Fig. 1. Fig. 4 is a perspective view of one of the cams of my lock. 'Fig. 5 is a perspective view in detail of thekey employed for unlocking the device Fig'f6 is a perspective view in detail of one of the auxiliary members employed for unlocking purposes.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the sash-rail, which is provided witha suitable mortise, in which is located a casing 6, composed of two twin members. This casing when fitted into the mortise is secured in place by screws or other suitable fastening devices passed through end flanges formed on the casing. The two casing members are connected by screws 2, whereby they are held together as a? (ilntegral device after the parts are assemb e Journaled in the casing are two cams 7, each of which is provided with a spindle 7 two faces 7 and 7, and a web 7 This web is centrally located and formed integrally with. the other parts of the cam. The face 7 extends outwardly from the spindle, while the face 7 is curved and forms the working or holding face of the cam. Between the cams are journaled two auxiliary members, (designatedatand t'flrespectively.) Each auxiliary member is provided with a hub whose extremities fit in bearings formed in the sides of the casing. These hubs are provided with teeth arranged to engage each other, whereby the two' parts may be simultaneously actuatedfor unlocking purposes by applying a key to one of the members. The two cams, as shown in the drawings, are embraced bya bow-shaped leaf-spring 8, whose extremities engage the webs 7 g of the cams and whose normal tendency is to hold the cams in position shown by dotted lines in Fig. 1, whereby they are forced outwardlytoward the adjacent surface of the'window-frame 3'o'r toward the bottom of the groove or way in which the sash slides. The hub of the auxiliary member 4. is fashioned to receive a key 9 to facilitate the operation of the auxiliary members, whereby the cam members. may be thrown to the position shown in full lines in Figs. 1 and 2, bringing the faces of the cams flush with or slightly removed from the face of the sash rail and permitting the free movement of the sash in theframe. As shown in the drawings, the hub or spindle of the auxiliary member4 is formed hollow, the opening being V- shaped on one side to fit the correspondinglyshaped stem 9'of the key 9. The opening and the shape of the key may of course be made as desired, the only object being to make these parts of such a peculiar shape that it will not be easy to unlock the device by use of any ordinary instrument. The outer extremity of the key is provided with a wing or projection 9 of a length to give the desired leverage in turning the key. The faces of the cam members are preferably formed smooth or free from teeth, as shown at A, to avoid marring or wearing the adjacent part of the window-frame.

Each auxiliary member is provided with a ation of my improved sash-lock will be readily understood. Referring to Fig. 1, the spring 8 will normally hold both cams outwardly against the adjacent part of the frame or the bottom of the groove or way in which the sash slides. Now if an attempt is made to lower the sash there will be a tendency to force one of the cams '7 outwardly, while if an attempt is made to lift the sash there will be a corresponding tendency to force the other cam 7 outwardly. In either case it is evident that the sash will be locked against movement. When it is desired to unlock the sash for the purpose of sliding it in either direction, the stem of the key 9 is inserted in the hub of the auxiliary member 4 and turned in the direction indicated by the arrow in Fig. 1. This action will throw both cams to the unlocked position, or that shown by full lines in Figs. 1 and 2,by virtue of the engagement of the interlocking teeth of the hubs of the auxiliary members.

When the sash has been properly adjusted, the key may be removed, thus preventing an unauthorized person from unlocking the sash.

My improved construction overcomes the defects of a construction in which the meshing teeth are formed directly on the cams, in which case both cams must move simultaneously, and when an attempt is made to move the sash in the one direction or the other there is a tendency of one cam to hold the sash against movement, while the tendency of the other cam is to neutralize the holding tendency of the first-named cam. My improved construction overcomes this difficulty, since the two cams are adapted to move independently of each other, the meshing teeth being formed on independent 00- operating members located intermediate the cams, as heretofore described.

Having thus described my invention, what I claim is- The combination with a sash-rail having a recess or mortise, of a sash-lock comprising a casing locatedin said mortise of the sash-rail and open on one side, two cams journaled in said casing, each cam having a spindle, a face 7 projecting radially from the spindle,a working face 7 and a central web, a bow-shaped leaf-spring embracing the webs of the cams and normally causing their working faces to protrude through the opening in the casing to engagement with the adjacent part of the window-frame or other structure in which the sash is located, and two auxiliary members located intermediate the cams and provided with hubs journaled in the opposite walls of the casing, said members being provided with wings adapted to engage the face 7 of the cams for unlocking purposes, the hubs of the auxiliary members being toothed and arranged to mesh for unlocking purposes, the spindle of one of the auxiliary members being fashioned to receive a key, the arrangement being such that the respective cams normally look the sash against movement in the opposite direction.

In testimony whereof I affix my signature in presence of two witnesses.

ABRAHAM M. SOUTHARD. Witnesses:

DENA NELSON, A. J. OBRIEN. 

